Posted By

ReedD19 on 10/03/12

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form
jquery

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Last Edited at 10/03/12 03:48am

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Shift+Click to Select/Deselect Checkboxes.

/ Published in: JavaScript

Allows you to click a given checkbox X, then shift click another checkbox Y. All checkboxes between X and Y will be checked or unchecked based on the state of checkbox Y. i.e. if you're unchecking Y all boxes between X and Y will also be unchecked.

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Copy this code and paste it in your HTML

var lastChecked = null;
var handleChecked = function(e) {
    if(lastChecked && e.shiftKey) {
        var i = $('input[type="checkbox"]').index(lastChecked);
	var j = $('input[type="checkbox"]').index(e.target);
	var checkboxes = [];
	if (j > i) {
	    checkboxes = $('input[type="checkbox"]:gt('+ (i-1) +'):lt('+ (j-i) +')');
	} else {
	    checkboxes = $('input[type="checkbox"]:gt('+ j +'):lt('+ (i-j) +')');
	}
 
	if (!$(e.target).is(':checked')) {
	    $(checkboxes).removeAttr('checked');
	} else {
	    $(checkboxes).attr('checked', 'checked');
	}
    }
    lastChecked = e.target;
 
    // Other click action code.
 
}
$('input[type=checkbox]').click(handleChecked);